Background: There are many calcium supplements available in the market, especially those
containing calcium in the form of carbonate, which unfortunately is not absorbed by the body to a sufficient
Method: Therefore, an attempt was made to prepare new sources of calcium, consuming the chicken
eggshells as natural raw materials, which were used in preparation of tablets containing calcium carbonate
and calcium citrate as well as tablets with calcium carbonate and calcium bisglycinate. The influence
of raw material properties on the pharmaceutical availability of calcium from the obtained tablets
Results: Based on the obtained calcium release profiles from the prepared tablets, it was found that the
optimal source of calcium is a preparation containing calcium from chicken eggshells. It was found
that both chicken eggshells and calcium bisglycinate (chelate) may be new, prospective sources of calcium.
Calcium citrate prepared using eggshells as starting materials and bisglycinate is completely released
within no more than 150 minutes.
Conclusion: In turn, calcium carbonate added to calcium bisglycinate statistically significantly prolonges
the release of calcium ions to 4 hours.